//
// Created by 123 on 2024/12/31.
//
#include "iostream"
using namespace std;

class C1{
    int m_a;//默认是私有的
};
struct C2{
    int m_a;//默认公共的
};

int main055(){
    C1 c1;
//    c1.m_a = 10;//
    C2 c2;
    c2.m_a = 10;

    return 0;
}